tofsee | 7b7e8d4b97439bbb4b4e84f76abe0ab65b7952e6d77954f73ecc4aa8aaca0368

Analysis

max time kernel
149s
max time network
147s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
31/12/2023, 03:29

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General

Target

266901a548588b9f1b220e7b57831b0e.exe
Size

10.8MB
MD5

266901a548588b9f1b220e7b57831b0e
SHA1

215017a2f19f678d864db773349addc17de580b1
SHA256

7b7e8d4b97439bbb4b4e84f76abe0ab65b7952e6d77954f73ecc4aa8aaca0368
SHA512

56f823948da80600fa254bba936d86672f62efb5ed383e1c644878f93f054620f0c3a7cd3fcaeaf53dcfa0df3bea9ba0e7966214b504bcdc064d04327884882d
SSDEEP

98304:cbxPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP:cb

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

176.111.174.19

defeatwax.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\gdhpmdxv = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

Windows Service
T1543.003

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Windows Service

T1543.003

pid	Process
2316	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\gdhpmdxv\ImagePath = "C:\\Windows\\SysWOW64\\gdhpmdxv\\qrgzusen.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2764	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2868	qrgzusen.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2868 set thread context of 2764	2868	qrgzusen.exe	41

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
2756	sc.exe
2132	sc.exe
2940	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2096 wrote to memory of 1420	2096	266901a548588b9f1b220e7b57831b0e.exe	29
PID 2096 wrote to memory of 1420	2096	266901a548588b9f1b220e7b57831b0e.exe	29
PID 2096 wrote to memory of 1420	2096	266901a548588b9f1b220e7b57831b0e.exe	29
PID 2096 wrote to memory of 1420	2096	266901a548588b9f1b220e7b57831b0e.exe	29
PID 2096 wrote to memory of 2436	2096	266901a548588b9f1b220e7b57831b0e.exe	30
PID 2096 wrote to memory of 2436	2096	266901a548588b9f1b220e7b57831b0e.exe	30
PID 2096 wrote to memory of 2436	2096	266901a548588b9f1b220e7b57831b0e.exe	30
PID 2096 wrote to memory of 2436	2096	266901a548588b9f1b220e7b57831b0e.exe	30
PID 2096 wrote to memory of 2132	2096	266901a548588b9f1b220e7b57831b0e.exe	33
PID 2096 wrote to memory of 2132	2096	266901a548588b9f1b220e7b57831b0e.exe	33
PID 2096 wrote to memory of 2132	2096	266901a548588b9f1b220e7b57831b0e.exe	33
PID 2096 wrote to memory of 2132	2096	266901a548588b9f1b220e7b57831b0e.exe	33
PID 2096 wrote to memory of 2940	2096	266901a548588b9f1b220e7b57831b0e.exe	35
PID 2096 wrote to memory of 2940	2096	266901a548588b9f1b220e7b57831b0e.exe	35
PID 2096 wrote to memory of 2940	2096	266901a548588b9f1b220e7b57831b0e.exe	35
PID 2096 wrote to memory of 2940	2096	266901a548588b9f1b220e7b57831b0e.exe	35
PID 2096 wrote to memory of 2756	2096	266901a548588b9f1b220e7b57831b0e.exe	37
PID 2096 wrote to memory of 2756	2096	266901a548588b9f1b220e7b57831b0e.exe	37
PID 2096 wrote to memory of 2756	2096	266901a548588b9f1b220e7b57831b0e.exe	37
PID 2096 wrote to memory of 2756	2096	266901a548588b9f1b220e7b57831b0e.exe	37
PID 2096 wrote to memory of 2316	2096	266901a548588b9f1b220e7b57831b0e.exe	40
PID 2096 wrote to memory of 2316	2096	266901a548588b9f1b220e7b57831b0e.exe	40
PID 2096 wrote to memory of 2316	2096	266901a548588b9f1b220e7b57831b0e.exe	40
PID 2096 wrote to memory of 2316	2096	266901a548588b9f1b220e7b57831b0e.exe	40
PID 2868 wrote to memory of 2764	2868	qrgzusen.exe	41
PID 2868 wrote to memory of 2764	2868	qrgzusen.exe	41
PID 2868 wrote to memory of 2764	2868	qrgzusen.exe	41
PID 2868 wrote to memory of 2764	2868	qrgzusen.exe	41
PID 2868 wrote to memory of 2764	2868	qrgzusen.exe	41
PID 2868 wrote to memory of 2764	2868	qrgzusen.exe	41

C:\Users\Admin\AppData\Local\Temp\266901a548588b9f1b220e7b57831b0e.exe
"C:\Users\Admin\AppData\Local\Temp\266901a548588b9f1b220e7b57831b0e.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2096
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gdhpmdxv\
  2⤵
  PID:1420
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qrgzusen.exe" C:\Windows\SysWOW64\gdhpmdxv\
  2⤵
  PID:2436
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create gdhpmdxv binPath= "C:\Windows\SysWOW64\gdhpmdxv\qrgzusen.exe /d\"C:\Users\Admin\AppData\Local\Temp\266901a548588b9f1b220e7b57831b0e.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2132
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description gdhpmdxv "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2940
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start gdhpmdxv
  2⤵
  - Launches sc.exe
  PID:2756
- C:\Windows\SysWOW64\netsh.exe
  "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
  2⤵
  - Modifies Windows Firewall
  PID:2316

C:\Windows\SysWOW64\gdhpmdxv\qrgzusen.exe
C:\Windows\SysWOW64\gdhpmdxv\qrgzusen.exe /d"C:\Users\Admin\AppData\Local\Temp\266901a548588b9f1b220e7b57831b0e.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2868
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2764

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\gdhpmdxv\qrgzusen.exe

Filesize
381KB

MD5
7779a0add0cee3a4bce8ebfcb117369c

SHA1
1dcd8117dcbeb533e8f96fb7bdaa8dcbb1f55540

SHA256
5d529077f665d23208aa3ec3ea516021d4ec9a4bfcc6bfc439ec107f2cb07cb7

SHA512
5d40b125f2b06236890658c33e1b07a3ec147ac0ede1cfd4bc8f8519239939fdf1c66522311b73dcf56ebc4d12f7cfb1eaf38583d714c08f94fb92c46fa699a5

Download Submit
memory/2096-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2096-4-0x0000000000400000-0x00000000009B1000-memory.dmp

Filesize
5.7MB

Download
memory/2096-1-0x0000000000AA0000-0x0000000000BA0000-memory.dmp

Filesize
1024KB

Download
memory/2096-9-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2096-8-0x0000000000400000-0x00000000009B1000-memory.dmp

Filesize
5.7MB

Download
memory/2764-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2764-13-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2764-10-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2764-20-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2764-21-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2764-22-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2868-15-0x0000000000AD0000-0x0000000000BD0000-memory.dmp

Filesize
1024KB

Download
memory/2868-17-0x0000000000400000-0x00000000009B1000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads